Long term problem need help solving!

Ok, so i've had this problem with my plants yellowing beginning at the tips of the leaves and then traveling along the edges and finally turning completely yellow (dead). I FINALLY figured out that I can upload pictures with my Webcam so here are some pictures. This problem has been going on with this plant ever since she/he got their second set of leaves... ending up in the first set of leaves dying and now the second set are dying and the yellowing is reaching the other leaves! I have never given the plants any nutes and the soil they originally started in was Hyponex which was a really cheap soil at .75 a bag so I don't think they contained enough nutrients to cause nutrient burn. I'm guessing it's a P.H. problem with my P.H. being at around the very least 7.0. I recently bought some Distilled Water and was going to flush it. Just posting pics to see if anyone thought it could be any other problem. The soil it is in now is Fox Farm Happy Frog (the women at the hydroponics store told be it wasn't as strong in nutrients as Ocean Forest).

how old r they

i would check the roots. are they white or brown?

Flush away dude flush away.

Well I flushed the plant with Distilled Water which supposedly had a P.H. of 6.0-ish though I heard with Distilled Water electronic P.H. reads have a hard time telling. Just hope it works

smokeybandit22 said:

how old r they

Click to expand...

He/she is only about 4 or 5 weeks old

post some updated pics and of the whole plant(s). distilled water should be ph nuetral, or 7. it looks like a def, perhaps K and/or mg. check out this thread and my reply posts-although grown in different medium, could be the same issues-lack of nutes/K and mg lockout from excessive fert salts:
https://www.rollitup.org/marijuana-plant-problems/155775-yellowing-leaves-top-minimum-crusting.html
it does not look like. some fine hydrated lime added to the top layer of your soil is a very cheap and effective addition to any soil grow.
what is your watering sched? does the soil dry out quickly?
like growtech said, I would flush and than feed 1/4 strength and work way up to 1/2 strength
https://www.rollitup.org/marijuana-plant-problems/155775-yellowing-leaves-top-minimum-crusting.html

smokeybandit22 said:

post some updated pics and of the whole plant(s). distilled water should be ph nuetral, or 7. it looks like a def, perhaps K and/or mg. check out this thread and my reply posts-although grown in different medium, could be the same issues-lack of nutes/K and mg lockout from excessive fert salts:
https://www.rollitup.org/marijuana-plant-problems/155775-yellowing-leaves-top-minimum-crusting.html
it does not look like. some fine hydrated lime added to the top layer of your soil is a very cheap and effective addition to any soil grow.
what is your watering sched? does the soil dry out quickly?
like growtech said, I would flush and than feed 1/4 strength and work way up to 1/2 strength

Click to expand...

Well I flushed it with a gallon of distilled water and nothing seemed to improve. I have some epson salt for MG def. but i'm not sure if I should use it. Here are some pics.

yup, that top pic looks alot like a k deficiency-yellowing of outer leaf edges, than turning brown necrotic, followed by/including whole leaf turning yellow, tips curl. I mean those pics kinda fuzzy, could be Ca issue, but not likely with the yellowing.
flush, in case of salt build up and immediately feed with balanced nutes, bloom would be good here

smokeybandit22 said:

yup, that top pic looks alot like a k deficiency-yellowing of outer leaf edges, than turning brown necrotic, followed by/including whole leaf turning yellow, tips curl. I mean those pics kinda fuzzy, could be Ca issue, but not likely with the yellowing.
flush, in case of salt build up and immediately feed with balanced nutes, bloom would be good here

Click to expand...

I have Fox Farm Big Bloom. Should I used 1/4 strength and water it?

I would keep on your same sched/nute load and add 1/4 strength of the bloom-maybe even 1/3rd but less than half for sho

I just have Fox Farm Grow Big atm. Would that be fine. Also they're not really on a watering shedule or nutes shedule. When should I give them nutes, like every 2-3 days or once a week?